Vacuum-valve for heating systems.



I'. SHURTLEFF.

VACUUM VALVE FOR HEATING SYSTEMS.

APPLICATION FILED MAR. 25, 1908.

2 SHEETS-SHEET l W/TNESSES ATTORNEYS W/ TNE SSE S Pgtented Aug. 10,1909.

2 SHEETS-SHEET 2.

A TTOHNE-YS entran siiaras terrena ernten,

VACUUM-VALVE FOR HEATING SYSTEMS.

No. 930,893. Specification of Letters lPatent. Patented Aug. 10, 1909.

Application filed March 25, 1908. Serial No. 423,163;

To all whomit 'may concern: this seat, and it is titted with a rubber or 55 lte it knoun that L Fiumi Sinnrrnuru, a sott composition disk 15 which insures a citizen ot' the liuited States`r residing)- at l\lo tight joint when closed. rl`he outlety from line` in the county1 ot ltoek .Island and State the casing on the other side ot the diaol5 Illinois. have invented a new and uset'ul phragm is through a check valve lo the caslinprovenmut in \':u-uinn\'alves for Heatingv 1T o'li whichiis connected to the casing 6U ing-Systems, oi which 4the 't'ollo\vin` is a l1 by `a short pipe th. lher check valve specification. opens to the atmospl'ierc. y

This invention is an improved valve or 'lhe valve it is :arried aty the upper end l0 combination ot' valves tor maintaining a ot' a stem 19 which worksthrough a bonnetl partial vacuum in a heating;` s v/i'st'eiu. lt is il() in the bottom ot theeasing and which is 6 capable ot' use with any vacuum heating connected to the casing 21 containing the system or other apparatus where, it is deflexible diaphragm 22, to which the valve sired to prevent the return ot air after it stent is fastened by vashers 23 and Q4 and has been expelled. put The diaphragm is open underneath It' is well known to those tamiliar with .te-the atmosphere by nleanspoij a hole 26 in 70 apparatus otl the kind mentioned that an "the easing and itfis subject tothe vacuum. ordinary check valve. will not hold tight above by means of aY slot 27`in' the valve enough to prevent air entering a space` in stem, allowing communication between the which a vacuum or partial vacuum is diaphragm casingv and the system in which tornuah this detect 'being incident to the the vacuum is to be produced. 75 small area -t'dr the air pressure to act on, Normally, that is when the system isat or a's well as to uneven or hard valve seats or above atmospheric pressure the diaphragm si glaces. To remedy this detect l provide valve remains open by gravity or by the ay diaphragm vvalve., the diaphragm beinr pressure within, and air is expelled through subject, on one side to the pressure within the cheek valve. lVhen-the vacuum is pro- S0 the heating system and on the other side to duced within the system the check valve the pressure of the atmosphere; and au tirst closes which establishes a partial auxiliary check valve is used to initially vacuum above the diaphragm and permits prpduce a slight vacuum which enables the theair pressure. thereunder to litt the same diaphragm valve to close,` atter which it reand tightly close the valve 14` which remains 85 mains closed while the system, remains beclosed while the condition ot vacuum exists. low atmospheric pressure. and in conse- ',llie passage to the. cheek valve is closed, quence otl the, large surt'aee ot the. diaphragm and no leak therethrough is induced, and rethe 'valve is pressed against its seat hard turn ot' air is impossible. lt is obvious that'4 cnougb'to make it absolutely air tight. the check valve is essential to produce the 90 'lhe invention is illustrated in the accompartial vacuum necessary to close the diapanying drawings in whichlibragni valve.

Figure l is a diagrammatic View oli the l claim: 40 system, and Fie'. 2 is a sectional view ot the 1. ln a heating system the combination valve. with the return conduit'` ot a valve casing 95 'l`he system shown in Fie, l comprises a establishing eonnnnnication between the reheater l` and a plurality of radiators 2, the turn conduit and the atniosphere7 check radiators beineA connected with the heater valve within said casing'. a second valve eas- V b v a supply pipe it. and a return pipe -l-. ingr arranged between thetirst valve casing 'the radiatorsv are also provided with an air and the system and provided with a bonnet. 100 pipe 5 which leads trom the upper part ot a diaphragm casing connected. withl said the radiator to the return pipe t, said pipe bonnet and a diaphragm in the zasing, a opening ou the outer side ot the check stem connected with the diaphragm and e2ivalve 5, tendingl thence througrl'i the bonnet and havrt`he valve is connected to the system or ingr a pa, e forming communication beapparatus at lt), which is an inlet to a valve tween one side ot the diaphragm and said easing 'll having a diaphragm l2 with ,valve second valve easing the other side o't the mt 12% therein. The valve llt closes against diaphragm being in communication with the atmosphere, :i diaphragm valve Second casing :1nd supported en the dinphragin Stein en the opposite Side of the bonnet from the diaphragm, und closing` ing :i direction toward the cheek vulve :1nd the lutter being,` arranged to elose'tnwnrd the diaphragm vulve und' coiniectionnI between the cheek vulve easing und the diaphragm valve casino'l all snhstnntially es described, whereby when the syStem ,is :it or :there ntniosphere pressure, the diaphragm vulve will be opened to permit the expulsion nl air through the cheek valve und when :i vacuum is produced within the system the Cheek vulve will Close establishing n partial rnenum above the diaphragm to permit the nth-nml nir pressure to operate the diul phrug'm to close its rnlre. :lll whstnnt'inlly i :is Het lnrth. i

L. ln '.t healing synteln pl'tn'idvd \\ith :ln outlet, :t vulve controlling; the outlet, :l dinphrng'n: ronnet-,ted tu Suid vulve :md hzlring' une side tht-reef in t-tnnnnlnit'ntinn with thi` heating' ,system :1nd the other side with tht` ntlnt'lsplnrt whereby tzu chine the outlet when the pressure in the system lull4 helen' thnt utE the ntinnsplwre, und n cheek vulve hutneen the smid \':1l\ l :1nd the outlet :1nd :11'- rzinged to rlnse toward the l xating H 'tv|n, for the purpose set 'foi-th.

' FRANK Sllllll'FLElFl".

Ni tnesses:

(lns'mris A. SnALLimY, HERMAN \V. NELSON. 

